Questions about DC motor

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levankhahung2712

New User
Location
vietnam
Occupation
student
. Why charcoal is used to make brush in in DC motor?

2. How to reduce sparks inside the brush and commutator? (Is it something relate to compensation winding and interpole winding)

3. How does the number of wires in a winding affect the DC motor?

4. What is some application of separatedly – excited DC motor? Why it is applied?
Thank you in advance
 
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